2015
DOI: 10.1016/j.physb.2014.12.004
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Band model for the understanding of ferromagnetism in semiconductors and insulators

Abstract: To investigate ferromagnetic semiconductors and insulators, such as the famous EuO, EuS, or CrBr 3 , we propose a hybridized Kondo-lattice model, where, in addition to the conduction electrons, localized moments (e.g., the 4f -electrons) are modeled as a strongly correlated band system. The quasi-empty conduction band is weakly filled due to the hybridization term. This activates the intraatomic exchange coupling between conduction and localized electrons. Temperaturedependent phase diagrams and quasiparticle … Show more

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